What is the typical fuel consumption per 100 kilometers on highways?

[StCora]

For most sedan models driving on highways at a speed of 100 kilometers per hour, the fuel consumption per 100 kilometers is approximately 6-10 liters. Here are some related details: Engine: The most fuel-efficient operating condition for an engine is under medium-to-high load. Both near-minimum load and near-maximum load conditions consume more fuel. Therefore, a moderate speed can provide the engine with a relatively high output-balanced resistance, keeping the engine operating in a relatively efficient range while the resistance itself isn't too great to consume excessive energy. This "balanced trade-off" represents the vehicle's economic speed.

[SanJude]

When I drive a sedan on the highway, the fuel consumption is usually around 6-8 liters. Last time I drove a 1.5L displacement car with the air conditioning on and two passengers, the displayed fuel consumption was only 6.3 liters per 100 kilometers. However, if I drive a 2.0T turbocharged SUV, the fuel consumption jumps to 8-10 liters. Speed has a significant impact; I've noticed that cruising at 120 km/h burns nearly 2 liters more fuel than at 100 km/h. Carrying heavy luggage or having insufficient tire pressure can also stealthily increase fuel consumption. I recommend checking the tires before long trips and maintaining an economical speed of 90-100 km/h for the best fuel efficiency.

[DeCalvin]

Veteran driver with over a decade of experience shares: Average highway fuel consumption for family sedans is around 5-7 liters. My 1.6L manual transmission once achieved 5.2L/100km at its best, while automatics typically consume about 1L more. Larger displacement vehicles are noticeably thirstier - my friend's 3.0L SUV drinks about 11L on highways. The key is avoiding aggressive acceleration; cruise control works best. Expect 0.5-1L extra fuel cost when using AC in summer, and roughly 0.3L additional consumption per 100kg of extra cargo weight.

[VonLucas]

People who focus on car data say this: The highway fuel consumption of mainstream compact cars is concentrated in the range of 5.5-7.5L. The drag coefficient has a significant impact. For example, hatchbacks consume about 10% more fuel than streamlined sedans. I've recorded fuel consumption at different speeds: around 5L at 80km/h, up to 6L at 100km/h, and soaring above 7L at 120km/h. Engine technology is crucial. The new direct injection engines save more than 1L compared to the old multi-point injection systems. Maintaining tire pressure at 2.5bar can save fuel, while modifying to wider tires increases resistance.

[MacKira]

Real Experience from a Female Car Owner: My automatic sedan consumes around 7 liters per 100km on highways. Once I forgot to close the sunroof, and the fuel consumption increased by 0.8 liters immediately. When the car is fully loaded with five passengers, the fuel consumption rises noticeably, and a fully packed trunk consumes even more fuel. Running the air conditioner at maximum consumes 1.5 liters more than not using it, so now I only use the second fan speed. I recommend clearing out any unnecessary items from the car before departure and choosing reputable gas stations when refueling, as low-quality gasoline can inexplicably increase fuel consumption.

[Gael]

Young people enjoy testing fuel consumption: My hybrid car only consumes 4.3L per 100km on highways, while pure gasoline cars typically start from 6.5L. Recently, using a mobile app to track, I found coasting downhill with the throttle released is most fuel-efficient. Carrying three friends increased fuel consumption from 6.1L to 7.2L, and speeding tickets cost way more than fuel savings. For gasoline cars, I recommend using 0W-20 grade oil, regularly changing air filters, and removing roof racks when not in use—these details can save significant fuel costs.